House electric



Aug. 14, 1928. 1,680,428

A. J. MOTTLAU THERMOSTATI C REGULATOR Filed April 25, 1924 Fig.2. [9 7 WITNESSES: INVENTOR fl. 8% Aug??? J. MofHau.

3 ATTORNEY Patented Aug. 14, 1928.

UNITED STATES AUGUST J. MOTTLAU,

HOUSE ELECTRIC & VANIA.

PATENT 02mm 0F PITTSBURGH, PENNSYLVANIA, AssiGNoR T0 wnsrrmw MANUFACTURING COMPANY,

A CORPORATION 013 'PEN N SYL- THERMOSTATIC REGULATOR.

Application filed April 25, 1924. Serial navoasis'. 1

It is also an object of my invention to provide a thermostatic regulator that combines the positive action obtained by using I fsylphon cells with the snap movement obtained by using a pre-shaped spring conn my copending application, Serial No. 704,989, filed April 8, 1924, I have shown and described a thermostatic regulator that is characterized by having af'pre-shaped 'resilient member, or spring contactor that moves with a snap action'when subjected to longitudinal pressure. In thexpresent in vention, I have adapted the spring contactor for use with sylphon cells. In the accompanying drawings,

igure 1 is an elevational view of a thermostatic regulator embodying my invention. Fig. 2 is a view, partially in elevation and partially in section, of my thermostatic regulator taken along the section line IIII of Fig. 1.

Fig. 3 is a. view, partially in cross section along the line III-III of Fig. 2, and par- Tl tially in elevation, lator.

My invention comprises, in general, a casing 1 in whichare mounted a plurality of thermal expansive sylphon wafers or cells 2 that are constructed of flexible metal members filled with an expansible fluid, such as ether, and a spring contactor 3 that is actuated by movement of the sylphon cells for of my thermostatic regue casingl comprises a cylindrical member 5 of-suitable material, such as brass, that is provided with a plurality of ventilating slots 6, a cap member 7, a. bottom or end member 8 and a supporting flange 9 secured thereto by rivets 11. The flange 9 may be mounted on awall or panel board and projects outwardly a sufficient distance to prothe casing 1 m such vide an air space entirelyaround the body portion of the casing; 1. ie cap-member 7 is provided with threads 12 that engage threads.- 13 Qnthe casing member. purpose of ,sccuring'the members"together.v The "tto'InI P01tion5. provided with a knurled surface'il} .an'indicator 15, that co operates with asca e' 16 On the, body, portion 1 and a "threaded boss 1? ask a' :p'uipose hereinafter "described;' LTl1e cap member-7 sup- Y supportsfthe' contact members 4.

One end o f thespring 3rest sin .the bush-' mg 19 and the" axis: thereof extends downwardly parallel,witlifthejfacefof the insulating block.21'a n'd atriglitiangles to ,the contact members 4. f ""I he c olr' tacbmeiiibrs 4' are so threaded that theirpositions in the insu lating block 21' andrela'tiveftdthejspring 3 may be adjusted)? spring 3 is such that'upon'the application of longitudinal pressure thereto, H jump or sna'ploutwardlyinto the position shown in broken lines in Fig. 2, thereby in terrupting thecircuit between the contact members ,4.

referred to. I

I 1e lower'jen'dof the spring 3 is mounted inaninsulating-bushing 25 that is similar to the bushing 19 and is supported by a member 26 't-hatis hingedlysupported, as at hereinafter for the purpose of retarding npwardmovement of the member 26 and jfor accelerating downward movement thereo The frame 24; heretofore re erred to, sup portsthe sylphon cells 2 in of the member 26. The frame 24 also acts as a guide for a base or supporting member 32 for the lower sylpho'n'cell 2Q 1,,forthe el eonfigur ationof the A threaded projection 33 extends longitution unless it is desired to change the adjustdinally' j of {the "Teasing aqd' j outwaidly irieiit thereof; {which operation is; performed through the threaded bss17; Ahrisememby turning the end member 8 to the right or her 34 for the frame 24 is provided with an left, as the case may be.

aperture through which ,-the extension 33 The members 28 and %9 limit the movein pe see-ii l i t iri tie aleent s t here ith ment 1 I i Q 26-pa1rmnoue .s

A coiled spring 35 is mounted about the eX- cient to eifect actuation of the ;resiiieut tension 33 between the supporting member nieinber'-"3', :fhd, as hereinbefore set forth, 32 and the base member 34 in such manner the spring 31 tends to delay the upward that the supporting member 32k biased upmovement of the riien'iber 26 and to accel 7 \vai'dly into engagement with the lower sylerate its doav n vard movement. As the e i eni e .4 is 1 tel pqepr ee basepl ate-fi iyt reby' raising p rower-li g a'r'n'oun'tbefore it will aaiflinove' int-r1 lthe phon cell 2 and the inner face ot the boss 17 springg is deformed in substantialiyihf is drawn'inwar'dly against the outer of manner shown in Fig.2, -it 'n'l illbe actuated the base plate 34. I to theposition shown .byt lii'b okeh ljnes n p i aims: t er eest i r e n n yf' ie. mammal we: a

"'d uritilfthe sure thereag i i .W'r i and .the ture of the dev ic iniis' he: 's ietef g 1 an apnreci' ble the norma H 'hi ii-pl s i gegem Pesifimehmw by, h 11 1. limes Fi -1 w A e? r n d e ri -me t. he ei pea ne ifi l 26. The position hingedlmeiiiber gfii between the tnop'ositions i' -frelatilvely large Y I dete in mgrnarh 'lo'ng'itiidiiial pressure and the springmtends reducejthis differl'p'osi o o a ene i on the spring "3, Theconta et 'mem'bers' 4 entia'l, thereby rnakin;' ;"it' possible-for the and the adjustingspreyyQQ(to device to ope rte' within clo'ser temperatuie h ip epey p si i ns eite ati n: z p' i h e- W 'z L e re-pror e 8 i a s sthee tn 'i h compre o aIh LTII Q Ei gulatq it i isfharla i iis rm tl.'tlie e p t* fi en iiie eerie-3 5w byiharixig' .p %h= 1 e re i intinm: desired for other "temperature settings;- lier aetiiatedl by sylphon cells'i-iiisuch man- As the temperature ofthe. airu pr ether heutliatit makesl na breaks' aneleetrieal niediumpassiii l'thr theislot 6, increases circuit with a positive ygithinflrlela ide e sese liilph ae l s 2 expa d r t i lma imit of mperwh n M contract, as piie; ;s .;m; be, xhe1 byea e I do not wish to be restrietedio the,spe:

ing 'movementof J .p voted memberfifi cific circuitconneetiqnsor arrangement of P id y; 0f d w rdlynpjj al d movepants -herein set vf o.1'th,-a s various modificament of the p voted member 26 is opposed tion s thereof may be .effepted, vith0ut-.de-

e pring 31, While ivdownward move: parting iron; the spirit and-s Opepf inY-inment of' the san ie is ac celerated thereby. vention. I desire, therefore; that on'ly-sueh supplies thermal enengv to the several svlresponsive-device.

, Cont-raction of the cells 2 permits the threaded e when a sufiicient amount of energyhas been limitations shallbe imposed are indicated stored in the 'sev eral.sylphoneells;2 tooverin the appended claims.

001116 the sp insi 31 andrthespring the I claim as :my invention: z-..

pivoted member. moij-es' W F 15' h i 1-, Ina therriidstafla eas'ihg.-:'I removable vcompressme he spr ng 6- 'l1;be. n e;3 threaded end 'm'ember' therefor, a Contac .t-h Y PQ lFkIQS W m v dotted spring and a thermally-responsive actuatn RQS OR hOWHiH Fifi 2 and away from ins means therefor :inoimted in the easing, the contact members A wherebv the eleelidjusting'meansiior thethrinaily-relspoh- 5 sive member comprising the reir ova'bleend tri cal 1 circuit therebetrveen is interrupted. If the contact members 4 are connected t a member. a threadedmember extending source of thermalenergy (not shown) that therethrough and engagingwhe thermally I and aiesiiiexitrmember nhon cells 2. it may he assumed :that the biasing. the threaded member into engagesource of thermal -enenswiis shutpfi". wherement with the thermallyresimnsiVe 'deviee. upon the cells 2 begin to cool and contract. QQIn a thermostat," a easing, a removable nd member therefor, i a contact pivoted member; 26 to 'rn'ove' downwardly. springand-a 'thernialiiv responsive"actuat- .,t.herehv removing the-longiti'fdinal pressure inzr means therefor mounted-'-in*the easing, 1 from the sprang-3 and it snaps hacli into its adinstinq means for 'theti'hermall-v-resp'on orier-inalposition completing the electrical sive member -eomprisinQ the removable end circuit :between-the'con'tact members 4. This member; a "threaded member extending cycle of operation continues indefinitely and therethrongh and engaging the thermallythe thermostatic regulator needs no attenresponsive device, and a resilientmeinber 1150 biasing the threaded member into engagemember co-operating therewith and engagment with the thermally-responsive device, ing the thermally-responsive device, and

circumferential movement of the end memmeans for biasing the co-operating member serving to vary the pressure exerted by her into engagement with the thermally-rethe resilient member on the thermally-responsive device, movement of the end memsponsive member. ber serving to adjust the thermal value at 3. In a thermostat, a casing, a movable which the thermostat operates.

end member therefor, a resilient contactor In testimony whereof, I have hereunto and a thermally-responsive actuating means subscribed my name this 17th day of April,

therefor mounted in the casing, adjusting 1924.

means for the thermally-responsive member comprising the movable end member, :1 AUGUST J. MOTTLAU. 

